Drill-press



(No Model.) 2 Sheets-Sheet 1. J. W. HAWKINS. DRILL PRESS.

No. 585,384. Patented June 29,1897.

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(No Model.) I 2 Sheets-Sheet 2. J. W. HAWKINS.

, DRILL PRESS. I No. 585,384. Patented June 29,1897.

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PATENT JOHN WESLEY HAWKINS, OF KENT, OHIO.

DRILL-PRESS.

SPECIFICATION forming part of Letters Patent No. 585,384, dated June 29,1897.. Application filed June 13,1895. Serial No. 552,624. (No model.)

T at whom it may concern.-

Be it known that I, JOHN WESLEY I-IAw- KINS, a citizen of the UnitedStates, and a resident of Kent, county of Portage, State of Ohio, haveinvented certain new and useful Improvements in Drill-Presses, of whichI hereby declare the following to be a full, clear, and exactdescription, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in drilling-machines; and theobjects of the invention are to provide means for obtaining the maximumvariation of speed in the drillshaft with the minimum complication ofmechanism.

My invention also has reference to the con-- struction of standard andhead and drill-shaft bearings. To obtain this result, Iemploy thefriction-cones and intermediate roller with the combination andarrangement of the various parts and construction of details, ashereinafter described, shown in theaccompanying drawings, and morespecifically pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of thedevice, and Fig. 2 is a vertical elevation with upper portions of thefigure in vertical central section. Fig. 3 is a detail of the standard,and Fig. 4 of the drill-feeding device.

In the figures, 1 is the standard, cast in one piece and annularlyslotted at 2 to receive the drill-platform 3, which is divided at 4 toinclose the slot. 5 is a head securely bolted to the top of the standardat 6 and supporting the vertical driving-shaft 7, to which are se curedthe pulley 8 and frictioncone 9, inclosed between vertical bearings 10and 11.

Upon bearings 12 and 13 and adjustable bearing 14 is supported thedrill-shaft l5, moving upon the spline 16, secured to the sleeve 17.Between the bearings 12 and 13 is secured the inverted cone 18, havingthe same angle of revolution as cone 9, and since their axes ofrevolution are parallel their opposite surfaces will be parallel.Between these cones is secured the disk 19, mounted upon the spindle inbearings 21 upon the sleeve 22. This sleeve is movable upon the inclinedshaft 23, parallel with the opposite surfaces of the cones, and securedin the bearings 24 upon the head 5.

A set-screw 25 secures the sleeve movably upon the shaft 23, and thedisk can be readily moved up and down the cones by hand while inengagement with the peripheries of both.

It will be seen that when the disk engages the smaller portion of thedriving-cone 9 near its apex a slow movement will be given the disk,which in turn will transmit it to the broadest portion of the peripheryof the cone 18, and hence a very slow movement will be given to thedrill-shaft. Again, in a central position an equal movement of bothcones of moderate speed will be obtained and transmitted to thedrill-shaft; but when the disk is engaged by the lower and broader edgeof the driving-cone it will engage the cone 18 near its apex and thustransmit a very rapid movement to the drill-shaft.

It will also be obvious that any intermediate degree of speed can beobtained at pleasure by this means from fast to slow by moving the diskup and down the cones.

In order to vary the tension of the disk upon the cones and to increaseit when great power is required, the driving-shaft is supported upon thefoot-rest 26, supported by the intermediate coiled. spring 27 in thesleeve 28, which is screw-threaded at its upper end and provided withthe wheel-nut 29, which rests upon the bearing 11.

By means of the spring the pressure of the disk is maintained constantand by means of the sleeve and nut may be increased or diminished atpleasure.

A brass washer 4:0 bet-ween the collar 41 and bearing 13 sustains thethrust of the disk 19 against the cone 18.

In Fig. 4: is seen a vertical section through the gear-shaft andoperating-handle for raising and lowering the drill-shaft. In this figure, 30 is the handle, provided with collar 31,

ing 39 supports the handle on the periphery of the disk. The advantagesof this form of device are that the handle can be adjusted to any angleon the shaft without removal,

thus being always accessible to the operator when at Work.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In a drill-press, in combination with the head 5, the paralleldriving-shaft 7 and drillshaft 15, having cones 9 and 18 reverse inposit-ion and with opposite surfaces parallel, the intermediate disk 19bearing upon the parallel surfaces of the cones, and the adjustablebearing for the driving-shaft consisting of foot-rest 26 spring 27screw-threaded sleeve 28 and wheel-nut 29 substantially as and for thepurposes described.

2. In a drill-press, in combination with the head 5, the driving-shaftand drill-shaft having cones 9 and 18 reverse in position and havingopposite surfaces parallel, the intermediate disk 19 mounted on spindle20 upon sleeve 22 having set-screw 25, and the adjustable bearin g forthe driving-shaft, consisting of foot rest 26, spring 27, screw-threadedsleeve 28 and wheel-nut 29, substantially as shown and for the purposesdescribed.

3. In a drill-press, in combination with the head 5 and integralstandard 1 annularly slotted to receive a removable platform, theparallel driving-shaft 7 and drill-shaft 15, having cones 9 and 18reverse in position and with opposite surfaces parallel, theintermediate disk 19' bearing upon the parallel surfaces of the cones 9and 18, and the adjustable hearing for the driving-shaft, consisting offootrest 26 spring 27 screw-threaded sleeve 28 and Wheel-nut 29,substantially as and for the purposes shown and described.

In testimonywhereof I hereby set my hand on the 8th day of May, 1895.

J. WESLEY IIAIVKINS.

Vitnesses:

WM. M. MONROE, GEO. O. WILLET.

